单词 | Angle |
释义 | Angle![]() Given two intersecting Lines or Line Segments, the amount of Rotation aboutthe point of intersection (the Vertex) required to bring one into correspondence with the other is called the angle One full rotation in these three measures corresponds to 360°, The use of Degrees to measure angles harks back to the Babylonians, whose Sexagesimal numbersystem was based on the number 60. 360° likely arises from the Babylonian year, ![]() does not require the insertion of multiplicative constants like ![]() The concept of an angle can be generalized from the Circle to the Sphere. The fraction of a Spheresubtended by an object is measured in Steradians, with the entire Sphere correspondingto A ruled Semicircle used for measuring and drawing angles is called a Protractor. A Compasscan also be used to draw circular Arcs of some angular extent. See also Acute Angle, Arc Minute, Arc Second, Central Angle, Complementary Angle,Degree, Dihedral Angle, Directed Angle, Euler Angles, Gradian, Horn Angle,Inscribed Angle, Oblique Angle, Obtuse Angle, Perigon, Protractor, Radian,Right Angle, Solid Angle, Steradian, Straight Angle, Subtend, Supplementary Angle,Vertex Angle
Dixon, R. Mathographics. New York: Dover, pp. 99-100, 1991. |
随便看 |
|
数学辞典收录了8975条数学词条,基本涵盖了常用数学知识及数学英语单词词组的翻译及用法,是数学学习的有利工具。